Clash with Porter Stemmer module

The alpha 12 version is not working at all with the Porter Stemmer module installed. I get the following errors:

* warning: preg_split() expects parameter 2 to be string, array given in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 15.
* warning: Invalid argument supplied for foreach() in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 19.
* warning: implode() [function.implode]: Invalid arguments passed in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 27.
* warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/dixingto/public_html/cpj/themes/engines/phptemplate/phptemplate.engine on line 58.
* warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/dixingto/public_html/cpj/themes/engines/phptemplate/phptemplate.engine on line 63.
* warning: preg_split() expects parameter 2 to be string, array given in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 15.
* warning: Invalid argument supplied for foreach() in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 19.
* warning: implode() [function.implode]: Invalid arguments passed in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 27.
* warning: Invalid argument supplied for foreach() in /home/dixingto/public_html/cpj/sites/all/modules/advanced_forum/advanced_forum.module on line 681.
* warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/dixingto/public_html/cpj/themes/engines/phptemplate/phptemplate.engine on line 58.
* warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/dixingto/public_html/cpj/themes/engines/phptemplate/phptemplate.engine on line 63.
* warning: extract() [function.extract]: First argument should be an array in /home/dixingto/public_html/cpj/themes/engines/phptemplate/phptemplate.engine on line 410.
* warning: Invalid argument supplied for foreach() in /home/dixingto/public_html/cpj/sites/all/themes/zen/cpj_fresh/blue_lagoon/advf-forum-list.tpl.php on line 49.
* warning: preg_split() expects parameter 2 to be string, array given in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 15.
* warning: Invalid argument supplied for foreach() in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 19.
* warning: implode() [function.implode]: Invalid arguments passed in /home/dixingto/public_html/cpj/sites/all/modules/porterstemmer/porterstemmer.module on line 27.

After turning off the Porter Stemmer everything seems to be fine.